Papers - IKEDA Shigeru
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Preparation of K2La2Ti3O10 by polymerized complex method and photocatalytic decomposition of water Reviewed
S Ikeda, M Hara, JN Kondo, K Domen, H Takahashi, T Okubo, M Kakihana
CHEMISTRY OF MATERIALS 10 ( 1 ) 72 - 77 1998.1
Joint Work
Authorship：Lead author Publisher：AMER CHEMICAL SOC
A polymerized complex (PC) technique was applied to the preparation of a highly active photocatalyst, K2La2Ti3O10, with a layered perovskite type structure to decompose H2O into H-2 and O-2. The catalyst prepared by the PC technique had a higher photocatalytic activity than that prepared by conventional solid-state reaction method.
DOI： 10.1021/cm970221c
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Effect of the particle size for photocatalytic decomposition of water on Ni-loaded K4Nb6O17 Reviewed
S Ikeda, A Tanaka, K Shinohara, M Hara, JN Kondo, KI Maruya, K Domen
MICROPOROUS MATERIALS 9 ( 43226 ) 253 - 258 1997.5
Joint Work
Authorship：Lead author Publisher：ELSEVIER SCIENCE BV
The photocatalytic activities of water splitting by small particles (0.1-2 mu m) of K4Nb6O17 were studied. The milled catalysts were prepared by two kinds of ball-milling methods from the powder whose particles were several tens of micrometers in diameter. The surface area of the milled catalyst measured by N-2 adsorption at 77 K increased by an order of magnitude. The crystal structure was almost retained as K4Nb6O17, as evidenced by the results of X-ray diffraction and scanning electron micrography. The photocatalytic activity for an overall decomposition of water of the Ni-loaded K4Nb6O17 was twice as high as that for the original catalyst. (C) 1997 Elsevier Science B.V.
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Layered niobium oxides - Pillaring and exfoliation Reviewed
K. Domen, Y. Ebina, S. Ikeda, A. Tanaka, J. N. Kondo, K. Maruya
Catalysis Today 28 ( 43102 ) 167 - 174 1996.4
Joint Work
Publisher：Elsevier
Several ion-exchangeable layered niobates were applied to prepare modified layered photocatalysts. K1-xLaxCa2-xNb3O10 (x = 0, 0.25, 0.50, 0.75), a layered perovskite series, with variable interlayer cation density, were used for the modification of the interlayer space by pillaring of silica and titania. The silica-pillaring process was monitored by NMR and the thermal stability was also examined. Silica-pillar was successfully introduced to all the series of perovskites which showed good photocatalytic activity. The preparation of titania-pillared layered niobates was more difficult. In the case of KCa2Nb3O10 (x = 0), we could not introduce a titania pillar, but in the case of K0.5La0.5Ca1.5Nb3O10 (x = 0.5) carrying less interlayer cation density, titania-pillar was introduced although the thermal stability was very poor. K4Nb6O17, another type of layered niobate, was used for the exfoliation and restacking of the niobate sheets. The structure and photocatalytic activity of the product was examined.